452 Meteorological Observationa in Upper Assam. 



THERiMOMETEK. 



Mean Diurnal Monthly Oscilla. 





Oscillations. 



tions. 



January, 



.... 13.2<^ 



22.66° 



February 



12.8 



24-88 



March, 



9.71 



22 



April, 



7.52 



24.66 



May, 



7-6 



20.10 



June, .... .... .... 



7.38 



17 



July, 



, 4.85 



16.33 



August, .... .... .... . . . 



5.42 



12 



September 



6.56 



15.66 



October, .... 



9.85 



21 



November, 



11.8 



22 



December, 



13.4 



24 



Mean, 



9.17 



20 



During the months of June, July, August and September, the variation in the 

 temperature is very trifling, as will be seen by the following observations made 

 at Sunrise and 2 p. m. on the 15th of each month, during three successive years : — 



June. 

 Sunrise, 2 p. m 



1840 77° 85° 



1841 78 85 



1842 77 85 



July. 

 Sunrise, 2 p. m. 

 78° 86° 



August. 



Sunrise, 2 P. u. 



78° 82° 

 79 82 

 78 80 



September. 



Sunrise, 2 p. m. 



75° 83° 

 80 88 

 78.3 86 



Table shewing the Mean Maxima and Minima^ from 3 successive Years^ 

 Observations. 



January, 

 February, . . 



March, 



April 



May, 



June, 



July, 



August,.... 

 September, 

 October, . . 

 November, 

 December, 



Barometer. 



Max. 



Min. 



Mean. 



Max. 



Min. 



Mean. 



Inches. 



In. 



In. 



o 



o 



o 



29.591 



29.326 



29.458 



70.88 



52. 



61.44 



56 



306 



433 



76.5 



51.96 



66.23 



446 



20 



323 



73.35 



62.69 



68.02 



41 



153 



281 



74.71 



67.39 



72.05 



35 



116 



233 



82.85 



73.97 



78.41 



223 



28.967 



09.48 



85.63 



77.37 



81.50 



193 



29.026 



109 



85.75 



79.75 



82.75 



27 



28.957 



113 



85.64 



78.32 



81.98 



30 



29.05 



175 



85.76 



77.7 



81.73 



476 



198 



337 



82.68 



71.56 



77.12 



573 



283 



425 



78.51 



56.33 



67.42 



5466 



3633 



45.49 



72.88 



48.00 



64.04 



Thermometer. 



